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Spanner Symbol

Spanner symbol illuminated - Non-resettable boiler fault

Baxi · Duo-tec 2 Combi GA Boilers

What does Spanner Symbol mean?

The spanner symbol is illuminated or flashing on the boiler display, indicating a fault that typically cannot be reset by the user and requires professional attention. Specific error codes will usually be displayed alongside this symbol.

Common Causes

  • A significant internal boiler fault or component failure.
  • Activation of a critical safety mechanism that requires an engineer to diagnose and repair.
  • Problem with a sensor or control board, often indicating a deeper issue.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Note the specific error code displayed alongside the spanner symbol (e.g., E117, E133) for diagnostic purposes.

  2. 2

    Do not attempt to repeatedly reset the boiler as the manual states these types of faults are not user-resettable.

  3. 3

    Contact your installer or the Baxi service division ('heateam') immediately to arrange for a service engineer visit.

Browse all codes in this manual (28)
Verified technical data. Last updated: April 2026

Related Faults

09Error 09 - Gas Valve Connection Cable Fault109Error 109 - Pre-circulation Fault110Error 110 - Safety Thermostat Activated
Source: Baxi Duo-tec 2 Combi GA Boilers
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